Procedure for the Cisco 1700
Contents
Introduction
Prerequisites
Requirements
Components Used
Related Products
Conventions
Step−by−Step Procedure
Example of Password Recovery
Procedure
Related Information
Introduction
This document describes how to recover the enable
password and the enable secret passwords. These
passwords protect access to privileged EXEC and
configuration modes. The enable password password can
be recovered, but the enable secret password
is encrypted and must be replaced with a new password. Use the
procedure described in this document in order to
replace the enable secret password.
Prerequisites
Requirements
There are no specific requirements for this
document.
Components Used
The information in this document is based on these
hardware versions:
· Cisco
1700 Series Router
· Cisco
1800 Series Router
The information in this document was created from
the devices in a specific lab environment. All of the
devices used in this document started with a cleared
(default) configuration. If your network is live, make sure
that you understand the potential impact of any
command.
Related Products
Refer to Password Recovery Procedures for
information on how to recover passwords for related products.
Conventions
Refer to
Cisco Technical Tips Conventions for information on document conventions.
Step−by−Step
Procedure
Follow these steps in order to recover your
password:
Attach a terminal or PC with terminal emulation to the
console port of the router.
Use these terminal settings:
¨ 9600
baud rate
¨ No
parity
¨ 8
data bits
¨ 1
stop bit
¨ No
flow control
Refer to these documents for information on how to
cable and connect a terminal to the console port
or the AUX port:
¨ Cabling
Guide for Console and AUX Ports
¨ Connecting
a Terminal to the Console Port on Catalyst Switches
¨ Connect
a Terminal to Catalyst 2948G−L3, 4908G−L3, and 4840G Series Switches
1.
If you can access the router, type show version at
the prompt, and record the configuration register
setting. See Example of Password Recovery Procedure
in order to view the output of a show version
command
Note: The configuration register is
usually set to 0x2102 or 0x102. If you can no longer access the
router (because of a lost login or TACACS password),
you can safely assume that your configuration
register is set to 0x2102.
2.
Use the power switch in order to turn off the
router, and then turn the router back on.
Important Notes:
In order to simulate this step on a Cisco 6400, pull
out and then plug in the Node Route
Processor (NRP) or Node Switch Processor (NSP) card.
¨
In order to simulate this step on a Cisco 6x00 with
NI−2, pull out and then plug in the NI−2
card.
¨
3.
Press Break on the terminal keyboard within
60 seconds of power up in order to put the router into
ROMMON.
If the break sequence does not work, refer to
Standard Break Key Sequence Combinations During
Password Recovery for other key combinations.
4.
Type confreg 0x2142 at the rommon 1> prompt in order to boot from
Flash.
This step bypasses the startup configuration where
the passwords are stored.
5.
Type reset at the rommon 2> prompt.
The router reboots, but ignores the saved
configuration.
6.
7. Type no after each setup question, or
press Ctrl−C in order to skip the initial setup procedure.
Type enable at the Router> prompt.
You are in enable mode and should see the Router# prompt.
8.
Type configure memory or copy
startup−config running−config in order to copy the nonvolatile
RAM (NVRAM) into memory.
Important: Do not type copy
running−config startup−config or write. These commands erase your
9.
startup configuration.
Type show running−config.
The show running−config command shows the
configuration of the router. In this configuration, the
shutdown command appears under all
interfaces, which indicates all interfaces are currently shut
down. In addition, the passwords (enable password,
enable secret, vty, console passwords) are in
either an encrypted or unencrypted format. You can
reuse unencrypted passwords. You must change
encrypted passwords to a new password.
10.
Type configure terminal.
The hostname(config)# prompt appears.
11.
Type enable secret <password>
in order to change the enable secret password. For example:
hostname(config)#enable
secret cisco
12.
Issue the no shutdown command on every
interface that you use.
If you issue a show ip interface brief command in
privilege EXEC mode, every interface that you
want to use should display up up. For example:
Router#show ip interface brief
13.
Type config−register <configuration_register_setting>.
Where configuration_register_setting is
either the value you recorded in step 2 or 0x2102
. For example:
hostname(config)#config−register
0x2102
14.
Press Ctrl−z or end in order to leave
the configuration mode.
The hostname# prompt
appears.
15.
16. Type write memory or copy
running−config startup−config in order to commit the changes.
Example of Password
Recovery Procedure
This section provides an example of the password
recovery procedure. This example was created with a Cisco
2600 Series Router. Even if you do not use a Cisco
2600 Series Router, this output provides an example of
what you should experience on your product.
Router>enable
Password:
Password:
Password:
% Bad secrets
Router>show
version
Cisco Internetwork
Operating System Software
IOS (tm) C2600 Software
(C2600−IS−M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)
Copyright (c) 1986−1999
by cisco Systems, Inc.
Compiled Tue 07−Dec−99
02:21 by phanguye
Image text−base:
0x80008088, data−base: 0x80C524F8
ROM: System Bootstrap,
Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
Router uptime is 3
minutes
System returned to ROM
by abort at PC 0x802D0B60
System image file is
"flash:c2600−is−mz.120−7.T"
cisco 2611 (MPC860)
processor (revision 0x202) with 26624K/6144K bytes of memory.
Processor board ID JAB031202NK
(3878188963)
M860
processor: part number 0, mask 49
Bridging
software.
X.25
software, Version 3.0.0.
Basic Rate
ISDN software, Version 1.1.
2
Ethernet/IEEE 802.3 interface(s)
2
Serial(sync/async) network interface(s)
1 ISDN
Basic Rate interface(s)
32K bytes
of non−volatile configuration memory.
8192K bytes
of processor board System flash partition 1 (Read/Write)
8192K bytes
of processor board System flash partition 2 (Read/Write)
Configuration register is 0x2102
Router>
!−−− The router was just powercycled, and during bootup a
!−−− break sequence was sent to the router.
!
*** System
received an abort due to Break Key ***
signal=
0x3, code= 0x500, context= 0x813ac158
PC =
0x802d0b60, Vector = 0x500, SP = 0x80006030
rommon 1
> confreg 0x2142
You must
reset or power cycle for new config to take effect
rommon 2
> reset
System
Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
Copyright
(c) 1999 by cisco Systems, Inc.
TAC:Home:SW:IOS:Specials
for info
C2600 platform
with 32768 Kbytes of main memory
program
load complete, entry point: 0x80008000, size: 0x6fdb4c
Self
decompressing the image : ###############################
##############################################################
##############################################################
##############################################################
###############################
[OK]
Restricted
Rights Legend
Use,
duplication, or disclosure by the Government is
subject to
restrictions as set forth in subparagraph
(c) of the
Commercial Computer Software − Restricted
Rights
clause at FAR sec. 52.227−19 and subparagraph
(c) (1)
(ii) of the Rights in Technical Data and Computer
Software
clause at DFARS sec. 252.227−7013.
cisco
Systems, Inc.
170 West
Tasman Drive
San Jose,
California 95134−1706
Cisco
Internetwork Operating System Software
IOS (tm)
C2600 Software (C2600−IS−M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)
Copyright
(c) 1986−1999 by cisco Systems, Inc.
Compiled
Tue 07−Dec−99 02:21 by phanguye
Image text−base: 0x80008088,
data−base: 0x80C524F8
cisco 2611 (MPC860)
processor (revision 0x202) with 26624K/6144K bytes of memory.
Processor board ID
JAB031202NK (3878188963)
M860 processor: part
number 0, mask 49
Bridging software.
X.25 software, Version
3.0.0.
Basic Rate ISDN
software, Version 1.1.
2 Ethernet/IEEE 802.3
interface(s)
2 Serial(sync/async)
network interface(s)
1 ISDN Basic Rate
interface(s)
32K bytes of
non−volatile configuration memory.
8192K bytes of processor
board System flash partition 1 (Read/Write)
8192K bytes of
processor board System flash partition 2 (Read/Write)
−−− System
Configuration Dialog −−−
Would you like to enter
the initial configuration dialog? [yes/no]: n
Press RETURN to get
started!
00:00:19:
%LINK−3−UPDOWN: Interface BRI0/0, changed state to up
00:00:19:
%LINK−3−UPDOWN: Interface Ethernet0/0, changed state to up
00:00:19:
%LINK−3−UPDOWN: Interface Ethernet0/1, changed state to up
00:00:19:
%LINK−3−UPDOWN: Interface Serial0/0, changed state to down
00:00:19:
%LINK−3−UPDOWN: Interface Serial0/1, changed state to down
00:00:20:
%LINEPROTO−5−UPDOWN: Line protocol on Interface BRI0/0,
changed state to down
00:00:20:
%LINEPROTO−5−UPDOWN: Line protocol on Interface Ethernet0/0,
changed state to up
Router>
00:00:20:
%LINEPROTO−5−UPDOWN: Line protocol on Interface Ethernet0/1,
changed state to up
00:00:20:
%LINEPROTO−5−UPDOWN: Line protocol on Interface Serial0/0,
changed state to down
00:00:20:
%LINEPROTO−5−UPDOWN: Line protocol on Interface Serial0/1,
changed state to down
00:00:50:
%SYS−5−RESTART: System restarted −−
Cisco Internetwork
Operating System Software
IOS (tm) C2600 Software
(C2600−IS−M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)
Copyright (c) 1986−1999
by cisco Systems, Inc.
Compiled Tue 07−Dec−99
02:21 by phanguye
00:00:50:
%LINK−5−CHANGED: Interface BRI0/0,
changed state to
administratively down
00:00:52:
%LINK−5−CHANGED: Interface Ethernet0/0,
changed state to
administratively down
00:00:52:
%LINK−5−CHANGED: Interface Serial0/0,
changed state to
administratively down
00:00:52:
%LINK−5−CHANGED: Interface Ethernet0/1,
changed state to
administratively down
00:00:52:
%LINK−5−CHANGED: Interface Serial0/1,
changed state to
administratively down
00:00:53:
%LINEPROTO−5−UPDOWN: Line protocol on Interface Ethernet0/0,
changed state to down
00:00:53:
%LINEPROTO−5−UPDOWN: Line protocol on Interface Ethernet0/1,
changed state to down
Router>
Router>enable
Router#copy
startup−config running−config
Destination filename
[running−config]?
1324 bytes copied in
2.35 secs (662 bytes/sec)
Router#
00:01:24:
%LINEPROTO−5−UPDOWN: Line protocol on Interface BRI0/0:1,
changed state to down
00:01:24:
%LINEPROTO−5−UPDOWN: Line protocol on Interface BRI0/0:2,
changed state to down
Router#configure
terminal
Enter configuration
commands, one per line. End with CNTL/Z.
Router(config)#enable
secret < password >
Router(config)#^Z
00:01:54:
%SYS−5−CONFIG_I: Configured from console by console
Router#show ip
interface brief
Interface IP−Address
OK? Method Status Protocol
Ethernet0/0
10.200.40.37 YES TFTP administratively down down
Serial0/0 unassigned
YES TFTP administratively down down
BRI0/0 193.251.121.157
YES unset administratively down down
BRI0/0:1 unassigned YES
unset administratively down down
BRI0/0:2 unassigned YES
unset administratively down down
Ethernet0/1 unassigned
YES TFTP administratively down down
Serial0/1 unassigned
YES TFTP administratively down down
Loopback0
193.251.121.157 YES TFTP up up
Router#configure
terminal
Enter configuration
commands, one per line. End with CNTL/Z.
Router(config)#interface
Ethernet0/0
Router(config−if)#no
shutdown
Router(config−if)#
00:02:14:
%LINK−3−UPDOWN: Interface Ethernet0/0, changed state to up
00:02:15:
%LINEPROTO−5−UPDOWN: Line protocol on Interface Ethernet0/0,
changed state to up
Router(config−if)#interface
BRI0/0
Router(config−if)#no
shutdown
Router(config−if)#
00:02:26:
%LINK−3−UPDOWN: Interface BRI0/0:1, changed state to down
00:02:26:
%LINK−3−UPDOWN: Interface BRI0/0:2, changed state to down
00:02:26: %LINK−3−UPDOWN:
Interface BRI0/0, changed state to up
00:02:115964116991:
%ISDN−6−LAYER2UP: Layer 2 for Interface BR0/0,
TEI 68 changed to up
Router(config−if)#^Z
Router#
00:02:35:
%SYS−5−CONFIG_I: Configured from console by console
Router#copy
running−config startup−config
Destination filename
[startup−config]?
Building
configuration...
[OK]
Router#show version
Cisco Internetwork
Operating System Software
IOS (tm) C2600 Software
(C2600−IS−M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)
Copyright (c) 1986−1999
by cisco Systems, Inc.
Compiled Tue 07−Dec−99
02:21 by phanguye
Image text−base:
0x80008088, data−base: 0x80C524F8
ROM: System Bootstrap,
Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
Router uptime is 3
minutes
System returned to ROM
by abort at PC 0x802D0B60
System image file is
"flash:c2600−is−mz.120−7.T"
cisco 2611 (MPC860)
processor (revision 0x202)
with 26624K/6144K bytes
of memory.
Processor board ID
JAB031202NK (3878188963)
M860 processor: part
number 0, mask 49
Bridging software.
X.25 software, Version
3.0.0.
Basic Rate ISDN
software, Version 1.1.
2 Ethernet/IEEE 802.3
interface(s)
2 Serial(sync/async)
network interface(s)
1 ISDN Basic Rate
interface(s)
32K bytes of
non−volatile configuration memory.
8192K bytes of
processor board System flash partition 1 (Read/Write)
8192K bytes of processor board System
flash partition 2 (Read/Write)
Configuration register
is 0x2142
Router#configure
terminal
Enter configuration
commands, one per line. End with CNTL/Z.
Router(config)#config−register
0x2102
Router(config)#^Z
00:03:20:
%SYS−5−CONFIG_I: Configured from console by console
Router#show version
Cisco Internetwork
Operating System Software
IOS (tm) C2600 Software
(C2600−IS−M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)
Copyright (c) 1986−1999
by cisco Systems, Inc.
Compiled Tue 07−Dec−99
02:21 by phanguye
Image text−base:
0x80008088, data−base: 0x80C524F8
ROM: System Bootstrap,
Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
Router uptime is 3
minutes
System returned to ROM
by abort at PC 0x802D0B60
System image file is
"flash:c2600−is−mz.120−7.T"
cisco 2611 (MPC860)
processor (revision 0x202)
with 26624K/6144K bytes
of memory.
Processor board ID
JAB031202NK (3878188963)
M860 processor: part
number 0, mask 49
Bridging software.
X.25 software, Version
3.0.0.
Basic Rate ISDN
software, Version 1.1.
2 Ethernet/IEEE 802.3
interface(s)
2 Serial(sync/async)
network interface(s)
1 ISDN Basic Rate
interface(s)
32K bytes of
non−volatile configuration memory.
8192K bytes of
processor board System flash partition 1 (Read/Write)
8192K bytes of
processor board System flash partition 2 (Read/Write)
Configuration register
is 0x2142 (will be 0x2102 at next reload)
Router#
Related Information
· Password
Recovery Procedures
· Cabling
Guide for Console and AUX Ports
· Connecting
a Terminal to the Console Port on Catalyst Switches
· Connect
a Terminal to Catalyst 2948G−L3, 4908G−L3, and 4840G Series Switches
· Standard
Break Key Sequence Combinations During Password Recovery
· Technical
Support − Cisco Systems
Courtesy by Cisco Official Website
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